Setup GeoIP2 – Optional PHP C Extension

I need someone to set up this :

https://github.com/maxmind/MaxMind-DB-Reader-php

using Optional PHP C Extension, currently I’m using Phar method, but I want to increase the performance of my lookups, to be able to do that I need to install this C extension to my PHP, my setup is a Centos 7.6, with Cpanel/WHM, when I try to install PHP-DEVEL I’m getting this:

No package php-devel available.

I need to someone to work-around this problem and complete the setup correctly. Thank you

I’m following this tutorial:

https://www.webfoobar.com/node/71